/*
 * Copyright (c) 2007, Nubo Technologies
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *
 *    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 *    * Neither the name of the Nubo Technologies nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.nubotech.gwt.oss.client;

import com.nubotech.gwt.oss.client.util.DateUtils;
import java.util.Date;

/**
 *
 * @author jonnakkerud
 */
public class RequestHeader {
    
    public static final RequestHeader CACHE_CONTROL = new RequestHeader("Cache-Control", "public,max-age=3600");    
    public static final RequestHeader CONTENT_DISPOSITION = new RequestHeader("Content-Disposition", "");
    public static final RequestHeader CONTENT_TYPE = new RequestHeader("Content-Type", "text/plain");
    public static final RequestHeader CONTENT_ENCODING = new RequestHeader("Content-Encoding", "");
    public static final RequestHeader EXPIRES = new RequestHeader("Expires", DateUtils.farFutureDate());    
    public static final RequestHeader CONTENT_MD5 = new RequestHeader("Content-MD5", ""); 
    
    private String name;
    private Object value;
    
    private RequestHeader(String name, Object value) {
        this.name = name;
        this.value = value;
    }
    
    public String getHeaderName() {
        return name;
    }
    
    public void setHeaderValue(Object value) {
        this.value = value;
    }
    
    public String getHeaderValue() {
        return convert(value);
    }

    public boolean equals(Object obj) {
        if (!(obj instanceof RequestHeader)) return false;
        RequestHeader rh = (RequestHeader)obj;
        if (rh.getHeaderName().equals(getHeaderName())) {
            return true;
        }
        else {
            return false;
        }
    }

    public static String getRequestHeaderValue(RequestHeader key, RequestHeader[] headers) {
        return getRequestHeaderValue(key, null, headers);
    }
    
    public static String getRequestHeaderValue(RequestHeader key, String defaultValue, RequestHeader[] headers) {
        String val = (defaultValue != null ? defaultValue : null);
        if (headers != null) {
            for (int i = 0; i < headers.length; i++) {
                if (headers[i].getHeaderName().equals(key.getHeaderName())) {
                    val = headers[i].getHeaderValue();
                    break;
                }
            }
        }
        return val;
    }
    
    protected String convert(Object value) {
        String result = "";
        if (value instanceof Date) {
            result = DateUtils.formatHTTPDate((Date)value);
        }
        else if (value instanceof String) {
            result = (String)value;
        }
        else {
            result = (value == null ? "" : value.toString());
        }
        return result;
    }
    
}
